Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea, 43 of the 50 subjects treated with echinacea developed rhinovirus infections. In a placebo​ group, 97 of the 111 subjects developed rhinovirus infections. Use a 0.05 significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts​ (a) through​ (c) below.

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Rhino viruses typically cause common colds. In a test of the effectiveness of​ echinacea,

43

of the

50

subjects treated with echinacea developed rhinovirus infections. In a placebo​ group,

97

of the

111

subjects developed rhinovirus infections. Use a

0.05

significance level to test the claim that echinacea has an effect on rhinovirus infections. Complete parts​ (a) through​ (c) below.

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